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@glatten tats Entrant @Him THOMAS BAKER, 0F NEW YORK, N. Y, Letters Patent ATO. 67,704, dated fing/ust 13, 1867.

IMPROVEMENT IN STOP-WATCHES.

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TO ALL WI-IOM IT MAY CONOERN:

Be it known that I, THOMAS BAKER, of New York city, have invented an Improvement in Watches;H and I do hereby declare that the following is a fall, clear, and exact description thereof, which will enable others skilled in the art to mak-e and use the same, reference being had to the accompanying drawings, forming part of this specification.

The present invention relates to that class of watches which are provided with an arrangement of mechanism for stopping and setting free the second-hand or the hand for indicating half, quarter, or any other fractional parts of a second. In watches of the description above stated, bythe arrangement of mechanism employed between the second, or quarter, or other fractional part of a second-wheel and the ratchet-wheel upon which the pusher acts, it oftentimes happened that in pressing in the' pusher to stop thereby thesecond-hand, such connecting parts would become so blocked, as it were, or, in other words, caught in such a position as to render it almost impossible without some trouble and annoyance to set the said 'second-hand free. To obviate the above is lthe object of this invention, and by it it-is successfully and satisfactorily accomplished, the invention oonsi'stingin forming the connection between the second, or quarter, or other fractional part of a secondwheel and the ratchet-wheel in such a manner that while the ordinary and requisite operation of the saine is not disturbed or affected thereby, no clogging or blocking of the parts can possibly occur, which, as before stated, has been experienced by the arrangement of parts for the same purpose heretofore in use. In the accompanying plate of drawings my improvement in watches is illustrated- Figure 1 being a face view of the front-plate of a watch with the dial-face removed, showing one mode of carrying out my invention, and

Figure 2 a similar view to iig. 1, but showing another arrangement of parts effecting the object of this invention, its principle of action being similar to that shown on fig. 1.

A in the drawings represents the case of a. watch, and B the front plate to its movement, on which plate, between it and the face of the watch, the `parts for stopping or arresting and setting free the second or quarter or other fractional part of a second-wheel are arranged. C the pusher, working against a lever, D, carrying a pawl, E, at one end, by which the ratchet-wheel F is turned, and G the spring stop to ratchet-wheel F. H the quarter-second wheel, the action of which carries the quartersecond hand.

The construction of the various parts above referred to, as well as their relative arrangement, is the saine as in similar watches no w in vcommon use, therefore needing no particular description herein, as this invention simply relates to the connection between the ratchet-wheel and the quarter-second wheel. In fig. the connection there shown consists of an arm, L, that at one end, M, is loose, engaging with the under or lower series of teeth ofthe ratchet-wheel. This arm extends from the said ratchet-wheel to and for a short distance beyond the quarter-second wheel, where it is secured by a set-screw, a, to the watch-plateg the portion of the said arm L, between its Iend .if'heresecured to the plate, and its point, N, by which it is caused to stop or arrest the move" ment of the quarter-second wheel, being suitably tempered to be elastic or springy. b a stop-pin in watch-plate for armL. In tig. lithe quarter-second wheel is shown as stopped or held by the arm-point N, from which, if the pusher is pressed in again, the under teeth of the ratchet-wheel then raise it, as in the ordinary connection between such wheels, but by the manner in which such arm is hung and the spring given -to it, as has been hereinabove described, it is plainly obvious that in the pressing in of the pusher to set free the quarter-second wheel it is impossible for the arm L to become blocked or clogged upon vthe ratchet-wheel-a very important advantage, fromthe fact that the arm can relieve itself at all times` By an inspection of tig. 2 inthe drawings it is plainly apparent that by the modification there shown the saine result or eifect is secured to that described for the arrangement shown in g. 1.

I claim as new, auddesire to secure by Letters Patent- A connection between the ratchet-wheel and the quarter-second wheel-of a watch, which is arranged so as to operate substantially as and for the purpose described.

The above speciiication of my invention signed by me this 2d day of January, 1867.

THOMAS BAKER.

Witnesses:

WM. F. MCNAMARA, ALBERT W. BROWN. 

